Moving Average: support of movingAverageUnits instead of Period to give flexibility to adapt to any needed time window

[arigit]

With reference to the discussion in #104

My use case: I have an IP bandwidth graph that is sampled once every 10 seconds. I am trying to use the Moving Average meta-query to add a moving average curve, and I need the time-window of the moving average to be 5 minutes, ie 30 samples.

I just discovered this plugin and it's functionality seems to fit my use case like a glove however, when I configured it assuming that the "Period" parameter was the "samples in the MA time window", I noticed that the moving avearge was flat (zero) with Period = 30, and then changing the Period to 4 I got the graph below, which is obviously not what I expected.

The thanks to @Gauravshah I realized that the "Period" parameter is in "Days" hence the issue.

So this is a request to change (or add a capability) to the Moving Average graphs to allow the "Time Window" to be specified in "units" (sample periods), e.g. if my graph has a datapoint every 10 seconds, then setting the Time Window to: 30 samples, should apply a 5-minute sliding window for the moving average.

[Gauravshah]

posting from #104

we added support for timeshiftUnits I think we need to add same for Moving Average that should fix your issue.
https://github.com/GoshPosh/grafana-meta-queries/pull/62/files